EP2284308A1 - Sewing machine needle with coupling tool preventing loss - Google Patents

Abstract

The needle (1) has a coupling member (3) bearing a coupling dial head (15) matching a needle coupling recess. The dial head includes a counter bearing surface (18) on a circumference and a coupling member coupling recess that is enclosed on three sides by a bearing surface and matches a needle dial head. A set of transverse bearing surfaces is provided on the coupling member and a needle body (2), where the transverse bearing surfaces are in temporarily abutment with each other and oriented transversely with respect to the bearing surface and the counter bearing surface.

Description

The invention relates to a knitting machine needle, in particular a Rippscheibennadel.

Especially in small circular knitting machines prevail on the Rippscheibe cramped conditions. The dial forms an annular bed for receiving the dial needles, which are also referred to as Rippnadeln. A corresponding small circular knitting machine is for example the WO 2009/013773 A1 refer to. The knitting machine described therein has a knitting cylinder with vertically arranged cylinder needles and a dial with horizontally arranged rib needles. The rib needles are moved by a needle selection mechanism located above the dial. The needle selection mechanism acts via pivotally mounted selections on the Rippnadeln.

In needle selection systems of this type, there is no firm connection between the selections and the ripple needles. The selection parts can move the Rippnadeln only radially outward. In addition, there is the danger that even a slight lateral deflection of the selection part can cause it to miss the needle butt and the needle is not operated properly. Next, the assembly of small circular knitting machine is associated with great manual effort, because the selection parts and the Rippnadeln must be handled separately.

In addition, connections are also in knitting machines known in which, for example, a knitting machine needle is connected to a selection or coupling part, wherein such a connection may allow a pivoting movement of the selection or the coupling part. These connections are releasable connections which are preferably releasable with respect to the transverse direction to the longitudinal axis of the knitting machine needle. As a result, the assembly and disassembly of the knitting machine needle and the selection or the coupling part can be difficult.

On this basis, it is an object of the invention to provide a knitting machine needle, in particular a Rippscheibennadel indicate, in which a positive connection between the selection part and the Rippnadel is given.

This object is achieved with the knitting machine needle according to claim 1:

The knitting machine needle according to the invention has a needle body which is connected to a selection part. The selection part can also be designed as a coupling part. To connect a hinge assembly or hinge assembly is used, which has an arranged on the needle coupling cutout and arranged on the coupling part disc head in one embodiment. In another embodiment, the coupling cutout is provided on the coupling part, while the disk head is formed on the needle body. In both cases, the disk head is provided in each case at its periphery with a bearing surface, which is associated with a trained on the coupling neck abutment surface. This arrangement of the bearing surface and abutment surface can accomplish a precise low-backlash and smooth-running storage. There is a good power transmission from the coupling part to the needle body in Nadelkörperlängsrichtung both in Austreibrichtung as well as in the retreat direction.

Preferably, a bearing surface of a coupling cutout encloses a disk head on its circumference at least on three sides and thus forms a joint arrangement. The three-sided enclosing is achieved by the bearing surface extending through an angle of more than 180 ° around the pivot axis of the joint. Thus, the disk head is secured in the cutout in all directions radially to the pivot axis.

The hinge arrangement formed by the disk head and the coupling cutout defines a pivot axis. The pivot axis is oriented in a Z-direction, which is to be understood transversely to the needle body. The longitudinal direction of the needle body is considered as the X direction. Perpendicular to both the X and Z directions is the Y direction, which is also referred to as the high direction. In at least one pivot position, the coupling part extends in this vertical direction or Y-direction. Depending on the installation situation, the coupling part may also extend in a direction that deviates from the Y direction.

Due to the design of the hinge arrangement in the form of a disk head and an associated coupling cutout, the coupling part is coupled to the needle body at least in the X direction. In order to produce captive security in the Z-direction, mutually matching and at least temporarily mutually abutting transverse bearing surfaces are provided on the coupling part and the needle body. These transverse bearing surfaces are at least then in contact with each other when the coupling part and the needle body are in such a pivotal position to each other, as it is assumed when the coupling part and the needle in the Rippscheibe or another needle bed are to be mounted. For example, this is a position in which the coupling part is slightly inclined to the vertical direction. By this measure it is prevented that the coupling part and the needle body when mounting, ie fall apart unintentionally when inserting into the needle bed. The handling of the existing of the needle body and the coupling part unit is greatly facilitated.

The coupling cutout can be a C-shaped cutout. Its edge thus follows in sections a circular arc. In the case of the U-cut is in principle a falling apart of coupling part and needle body in the Y direction possible. In the case of the C-section, the coupling between the needle body and coupling part is given in both the X and Y directions. In both cases, the coupling in the Z direction is effected by the transverse bearing surfaces.

The transverse bearing surfaces may be disposed within the disk head and in the region bounded by the coupling cutout or outside thereof. This applies both to the arrangement of the disk head on the coupling part as well as for embodiments in which the disk head is arranged on the needle body. If the transverse bearing surfaces are arranged in the area bounded by the coupling cutout, the disk head is preferably divided longitudinally. It thus has two head halves, which may be arranged symmetrically with respect to the XY plane. In this case, the securing of the disk head on a wall extending in the Y-direction between its head halves can take place by means of at least one projection which, for example, extends from a head half into an opening in the centrally arranged wall. Preferably, the projection in the opening has so much play that the pivot bearing not by the projection and the opening but only by the bearing surface and the abutment surface is effected.

• Figur 1 eine Strickmaschinennadel, in perspektivischer Darstellung mit zugeordnetem, Kupplungsteil in abschnittsweiser Darstellung,
• Figur 1a ein im Horizontalschnitt veranschaulichtes ausschnittsweises Detail aus der Strickmaschinennadel nach Figur 1
• Figur 2 die Strickmaschinennadel nach Figur 1 mit Auswahlteil, in schematischer Seitenansicht,
• Figur 3 die Strickmaschinennadel nach Figur 1 in einer ausschnittsweisen Seitenansicht,
• Figur 4 eine abgewandelte Ausführungsform der erfindungsgemäßen Strickmaschinennadel, in ausschnittsweiser Seitenansicht,
• Figur 5 eine weitere abgewandelte Ausführungsform der erfindungsgemäßen Strickmaschinennadel in ausschnittsweiser perspektivischer Explosionsansicht und
• Figur 6 die Strickmaschinennadel nach Figur 5, in ausschnittsweiser Vertikal-Querschnittsdarstellung.

Further details of advantageous embodiments of the invention are the subject of the drawing, the description or claims. The description is limited to essential aspects of the invention and other conditions. The drawing should be used as a supplement: It shows:

• FIG. 1 a knitting machine needle, in perspective view with associated, coupling part in sections,
• FIG. 1a a detail of the knitting machine needle illustrated in horizontal section FIG. 1
• FIG. 2 the knitting machine needle behind FIG. 1 with selection part, in schematic side view,
• FIG. 3 the knitting machine needle behind FIG. 1 in a fragmentary side view,
• FIG. 4 a modified embodiment of the knitting machine needle according to the invention, in a sectional side view,
• FIG. 5 a further modified embodiment of the knitting machine needle according to the invention in a fragmentary perspective exploded view and
• FIG. 6 the knitting machine needle behind FIG. 5 , in partial vertical cross-sectional representation.

In FIG. 1 is a knitting machine needle 1 illustrated, which is prepared for use in a dial and thus can be referred to as Ripple needle or Rippnadel. However, the invention is not limited to Rippnadeln, but can also apply to knitting machine needles that are not used in dials.

To the knitting machine needle 1 include a needle body 2 and a coupling part 3. The needle body 2 is preferably formed as an elongated flat part. At one end it is provided with a hook 4, which serves the stitch formation. The hook 4 may be associated with other elements, such as a pivotally mounted in the vicinity of the hook 4 tongue 5. This is pivotally mounted in a tongue slot 6 so that its end 7 cover the tip of the hook 4 and thus close the hook 4 or can also go in reserve in a position remote from the hook 4, to release the hook 4.

On a flank 8 of the needle body 2, a cap spring 9 may be provided, which is held at one end 10 fixed to the needle body 2. Its tip 11 may rest against the flank 8 or the bottom of a depression located there. Between the cap spring 9 and the flank 8 of the needle body 2, a puncture chamber 12 is preferably defined, through which another needle for stitch transfer can pierce.

From the cap spring 9, the needle body 2 extends to a remote from the hook 4 end 13. Between the end 13 and the cap spring 9 is a hinge assembly 14 for pivotally mounting the coupling part 3 formed on the needle body 2. This hinge assembly 14 defines a pivot axis that coincides with the Z direction coincides and is thus oriented parallel to the pivot axis of the tongue 5. For clarity, in FIG. 1 the directions X, Y and Z are entered. The X direction coincides with the longitudinal direction of the needle body 2. The Z direction is the associated transverse direction and the Y direction is the associated vertical direction. For additional understanding is on FIG. 2 which shows a simplified isometric side view with the associated coordinate directions X and Y.

To the hinge assembly 14 includes a disk head 15 and a matching coupling cutout 16. The disk head 15 is attached to the coupling part 3 and is therefore referred to as a clutch disk head 15. The coupling cutout 16 is attached to the needle body 2 and is therefore referred to as a needle coupling cutout 16. The disk head 15 is preferably a circular disk. In other words, its edge follows more than 180 ° in a circular arc. It is possible that this arc is interrupted by recesses (not shown). The coupling cutout 16 is a C-shaped cutout. Its edge follows a circular arc, whose radius is only slightly larger than the radius of the edge of the disk head 15. The disk head 15 wiest in Z-direction flat sides whose distance from one another determines the thickness D1 of the disk head 15. The section of the needle body 2 which surrounds the coupling cutout 16 likewise has flat sides whose spacing determines the thickness D2 of the needle body in this area. This thickness D2 coincides with the aforementioned thickness D1. For clarification is on FIG. 1a referenced, the a horizontal section through the knitting machine needle 1 after FIG. 1 approximately at the level of the dashed line 17 illustrated. The thickness ratios are also comparable below this line 17 approximately at the height of the line 30.

The coupling disk head 15 is provided on its outer circumference with an abutment surface 18. This follows a circular arc and is thus cylindrical or partially cylindrical. However, it can also be formed spherical or slightly conical.

The associated needle coupling cutout 16 has a bearing surface 19 which encloses the abutment surface 18 ( FIG. 3 ). As a result, the coupling disk head is mounted pivotably in the needle coupling cutout 16 with little play. During a pivoting movement of the coupling part 3, the abutment surface 18 is guided by the bearing surface 19. On the hinge assembly 14 or in the vicinity thereof, a transverse securing means 20 is arranged. This serves to keep the clutch disk head 15 captive in the needle coupling recess 16 when the knitting machine needle 1 is removed from the needle bed, ie, for example, the dial. In the present exemplary embodiment, the transverse securing means 20 comprises a nose 21 formed on the coupling part 3 whose thickness to be measured in the Z direction is smaller than the thickness D1 of the coupling part 3 to be measured in the same direction. The nose 21 is here, for example, on the needle body 2 formed recess in the form of a slot 22, which is adapted to receive the nose 21. For further clarification is in this context also on FIG. 1a directed. The slot 22 may be disposed adjacent to or in direct connection with the needle coupling recess 16. The spatial assignment is preferably made such that the nose 21 is in the slot 22 when the coupling part 3 in an assembly, disassembly position starting from the position to FIG. 2 slightly to the left, that is inclined towards the hook 4. The nose 21 preferably has two flat transverse bearing surfaces 21a, 21b arranged parallel to each other The slot 22 is preferably bounded by two mutually parallel transverse bearing surfaces 22a, 22b. When the nose 21 is in the slot 22, the transverse bearing surfaces 21a, 21b are supported on the transverse bearing surfaces 22a, 22b in the Z-direction.

Preferably, the nose 21 and the slot 22 are centered with respect to the needle body 2 and the coupling part 3 and symmetrical to the median plane extending in the X and Y directions.

The dimensions of the nose 21 and its associated slot 22 may be such that in the assembly, disassembly position between the transverse bearing surface 21a, 21b of the nose 21 and its associated transverse bearing surface 22a, 22b of the slot 22, a frictional connection is formed and thus the coupling part 3 is frictionally connected to the needle body 2. For this purpose, it is possible that the transverse bearing surfaces 21a and 21b are arranged conically, converging at an acute angle and thus decreases the thickness of the nose 21 in the direction of its tip. The slot 22 may then be formed congruent to the nose 21, wherein the opening of its nose 21 associated with the tip has a greater width than the slot bottom. As a result, the nose 21 can be easily inserted into the slot 22. In order to influence the frictional engagement between the needle 21 and the slot 22, the conicity of the nose 21 and the slot 22 may differ from each other and be formed differently strong.

During operation of the knitting machine needle 1, this can be reciprocated by a corresponding movement of the coupling part in the X direction. The coupling part 3 can perform a pivoting movement to move the needle body 1 to effect the knitting operation in the X direction forward or backward. there the clutch disc head 15 performs a limited rotational movement within the needle coupling section 16. The conditions may be such that the lug 21 is permanently inside the slot 22. However, it is also permissible that the nose 21 leaves the slot 22. Within the needle bed, ie the dial, the coupling part 3 and the needle body 2 are held together by the flanks of the respective needle channel, provided it is ensured that the hinge assembly 14 does not leave the needle channel.

In contrast, when the hinge assembly 14 leaves the needle channel, the nose 21 is previously dipped in the slot 22, thus ensuring the connection between the coupling part 3 and the needle body 2 in the Z direction. This connection is also given when the needle body 2 and the coupling part 3 are removed, for example, for disassembly of the dial.

Unlike in Figure 1 to 3 illustrated, the nose 21 may also be part of the needle body 2, while then the slot 22 is attached to the coupling part 3. It is both possible to arrange the combination of nose 21 and slot 22 on the hook 4 side facing the coupling part 3, similar to in FIG. 1 represented as well as at the rear, the end 13 facing side. Also, two lugs 21, one on the hook 4 side facing and on the opposite side facing the end 13 may be provided on the coupling part 3, then corresponding slots 22 may be provided on both sides of the hinge assembly 14 to the respective Nose 21 record. Also, on both sides of the hinge assembly 14 on the needle body 2 lugs 21 may be arranged, which engage in corresponding slots 22 of the coupling part 3.

FIG. 4 illustrates a further modified embodiment of the knitting machine needle according to the invention 1. This embodiment differs by the formation of the hinge assembly 14. The disk head is now associated with the needle body 2, which is why it is referred to here as a needle-disk head 23. The coupling cutout is here associated with the coupling part 3, which is why it is referred to here as coupling part coupling cutout 24. With regard to all other features and variations, in particular with regard to the abutment surface 18, the bearing surface 19, the nose 21 and the associated slot 22, the above description applies accordingly.

In all the embodiments described above, the transverse securing means 20 is disposed outside of the hinge assembly 14. However, it is equally possible in all these embodiments to arrange the transverse securing means 20 within the hinge assembly 14. This will be the example of an embodiment after FIG. 5 explained. The coupling cutout is merely exemplified as a needle coupling cutout 16 '. Its abutment surface 18 follows a circular arc-shaped curvature of about 180 °. This is a U-shaped coupling cutout. Provided approximately centrally within the needle coupling cutout 16 'is a wall 25 which is preferably arranged approximately centrally and parallel to the XY plane; the coupling disc head 15 is subdivided into head halves 15a, 15b, between which a head slot 26 is formed. The head slot 26 preferably has a slot width which is slightly larger than the thickness of the wall 25, as for example also FIG. 6 is apparent.

While the coupling between the coupling part 3 and the needle body 2 in all the embodiments described above is provided that the bearing surface 19 extends more than 180 ° around the respective disk head 15 and 23 around, so a C-shaped coupling cut is formed, the fuse in the Y direction in the embodiment according to FIG. 5 formed by a captive 27, to which a formed in the wall 25 opening 28 belongs. The opening 28 is preferably set concentrically to the pivot axis (hinge axis) defined by the abutment surface 18 and the bearing surface 19. At least one of the head halves 15a, 15b, preferably both, are provided at the opening 28 with a protruding into the opening 28 projection. This can be achieved by a corresponding local plastic deformation of the head halves 15a, 15b, as in FIG. 6 indicated. The protrusion 29 illustrated there on the head half 15b is generated, for example, by an inwardly directed plastic deformation in this area of the head half 15b. Preferably, the projection 29 and the opening 28 are not used for storage and thus for fixing a hinge axis, but only as captive. The pivot bearing, however, is preferably formed by the abutment surface 18 and the bearing surface 19.

This type of captive by means of the central wall 25, the opening 28 and corresponding projections 29 can also be used in all the embodiments described above, if instead of the C-shaped coupling cutouts 16, 24 U-shaped coupling cutouts are to be provided.

To simplify the handling of knitting machine needles and associated coupling parts, especially in the assembly of dials, a knitting machine needle is provided with pivotally mounted on this coupling part. For securing the side of the coupling part 3 on the side Needle bodies serve transverse bearing surfaces 21a and b and 22a and b, which are at least temporarily in abutment with each other.

reference numeral

1

Knitting machine needle

2

needle body

3

coupling part

4

hook

5

tongue

6

latch slot

7

The End

8th

flank

9

transfer spring

10

The End

11

top

12

Einstechraum

13

The End

14

hinge assembly

15

Clutch wheel head

15a, 15b

head halves

16, 16 '

Needle clutch cutout

17, 30

line

18

Thrust face

19

storage area

20

Cross-securing means

21

nose

21a, 21b

Cross bearing surfaces

22

slot

22a, 22b

Cross bearing surfaces

23

Needle wheel head

24

Coupling part coupling cutout

25

wall

26

head slot

27

captive

28

opening

29

head Start

Claims (15)

Knitting machine needle (1), in particular Rippscheibennadel
with a needle body (2) provided with a hook (4) and at a location spaced from the hook (4) a needle coupling cutout (16) enclosed by a bearing surface (19) or alternatively a needle wheel head (23 ), which is provided at its periphery with a bearing surface (19),
with a coupling part (3) which at one end has a coupling disk head (15) which fits the needle coupling cutout (16) and carries an abutment surface (18) at its periphery, or alternatively a three-sided bearing surface (19) in which the needle wheel head (23) has a matching coupling part coupling cutout (24),
wherein on the coupling part (3) and the needle body (2) matching and at least temporarily abutting each other transverse bearing surfaces (21a, 21b, 22a, 22b) are provided which are oriented transversely to the bearing surfaces (19) and abutment surfaces (18) , Knitting machine needle according to claim 1, characterized in that the needle coupling cutout (16) is a C or U-neck. Knitting machine needle according to claim 1, characterized in that the coupling disk head (15) is a circular disk head. Knitting machine needle according to claim 1, characterized in that the coupling part coupling cutout (24) is a C or U-neck. Knitting machine needle according to claim 1, characterized in that the needle-disk head (23) is a circular disk head. Knitting machine needle according to claim 1, characterized in that the needle coupling cutout (16) together with the coupling disk head (15) or alternatively the coupling part coupling cutout (24) together with the needle wheel head (23) has a hinge arrangement (14) with a Form pivot axis, which is oriented transversely to the knitting machine needle (1). Knitting machine needle according to claim 1, characterized in that at least one of the transverse bearing surfaces (21a, 21b, 22a, 22b) is arranged on one of the needle coupling cutout (16) or the coupling part coupling cutout (24) enclosed area. Knitting machine needle according to claim 7, characterized in that the transverse bearing surface (21a, 21b) is formed on a wall (25) arranged in the enclosed area. Knitting machine needle according to claim 8, characterized in that in the coupling cutout (16, 24) mounted disc head (15, 23) consists of two head halves (15a, 15b), between which a head slot (26) for receiving the wall (25) out -Kopfschlitz (26) for receiving the wall (25) is formed. Knitting machine needle according to claim 9, characterized in that the disk head (15, 23) is secured by means of a radial captive (27) on the wall (25). Knitting machine needle according to claim 10, characterized in that the radial Verliersicherung (27) by at least one projection (29) is formed, which projects from a head half (15b) in an opening formed in the wall (25) opening (28). Knitting machine needle according to claim 1, characterized in that at least one of the transverse bearing surfaces (21a, 21b, 22a, 22b) outside of the needle coupling cutout (16) or the coupling part-coupling cutout (24) enclosed area is arranged. Knitting machine needle according to claim 1, characterized in that at least one of the transverse bearing surfaces (21a, 21b, 22a, 22b) on a nose (21) is provided, which is arranged on the coupling part (3) or the needle body (2). Knitting machine needle according to claim 13, characterized in that the nose (21) is associated with a slot (22) formed in the needle body (2) or in the coupling part (3). Knitting machine needle according to claim 1, characterized in that the disk head (15), the coupling part (3) and the needle body (2) have a uniform, have matching thickness (d1, d2).

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